Few grocery stores are available in Mayrhofen, but this is more than compensated for by the abundance of inexpensive restaurants and cafes. These stores are open until 7-8pm. The Erlebnis Sennerei Zillertal cheese factory is well known, and you can always buy fresh cheeses in its store.
But many restaurants in Mayrhofen offer food delivery. In addition, you can always ask for a dish to be wrapped up and there is no problem with that. People in the Alps love a good meal. Pizza and sushi delivery is also possible, there are pizzerias and sushi bars in Mayrhofen. Thai and Chinese food in Mayrhofen is available at the Thai Peak restaurant, delivery to the hotel by arrangement.